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RT4801HWSC Datasheet(PDF) 3 Page - Richtek Technology Corporation

Part # RT4801HWSC
Description  Dual Output LCD Bias for Smartphones and Tablets
PDF  22 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT4801HWSC Datasheet(HTML) 3 Page - Richtek Technology Corporation

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RT4801H
Copyright © 2016 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS4801H-00
May
2016
www.richtek.com
3
Function Block Diagram
N1
P1
SCP1
RP2
RP1
VOP
CF2
VIN
ENP
GND
PGND
LXP
PWM
Logic
UVLO
OCP1
RN2
RN1
SCP2
VON
DAC
+
-
Oscillator
I
2
C
VREF
Bandgap
Reference
-1x
Charge Pump
CF1
Soft-Start
ENN
SCL
LDO
+
-
GM
VREF
DAC
SDA
VREF
Fast
Discharge
VOP
VON
BST
OVP
Operation
The RT4801H is a highly integrated Boost, LDO and
inverting charge pump to generate positive and
negative output voltages for LCD panel bias or
consumer products. It can support input voltage range
from 2.5V to 5.5V and the output current up to 80mA.
Both
positive
and
negative
voltages
can
be
programmed by a MCU through the dedicated I2C
interface. The RT4801H provides Over-Temperature
Protection (OTP) and Short Circuit Protection (SCP)
mechanisms to prevent the device from damage with
abnormal operations. When the EN voltage is logic low
for more than 375
s, the IC will be shut down with low
input supply current less than 1
A.



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